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Analysis of skin deformation profiles during sinusoidal vibration of fingerpad.

Authors
Wu-JZ; Dong-RG; Schopper-AW; Smutz-WP
Source
Ann Biomed Eng 2003 Jul; 31(7):867-878
NIOSHTIC No.
20023540
Abstract
Vibrotactile perception threshold measurement has been widely used to diagnose the severity of peripheral neuropathy associated with hand-arm vibration syndrome and sensory losses in stroke and diabetic patients. The vibration perception threshold is believed to be influenced by many factors, such as contact force and vibration frequency. The present study is intended to analyze, theoretically, the time-dependent deformation profile of skin surface, strain distributions within soft tissue, and response force of a fingertip when it is stimulated by a probe vibrating with a sinusoidal movement. A two-dimensional finite element model, which incorporates the essential anatomical structures of a finger: skin, subcutaneous tissue, bone, and nail, has been proposed to analyze the effects of vibration amplitude, frequency, and preindentation on the dynamic interaction between the fingerpad and vibrating probe. The simulation results suggest that the fraction of time over which the skin separates from the probe during vibration increases with increasing vibration frequency and amplitude, and decreases with increased preindentation of the probe. The preindentation of the probe has been found to significantly reduce the trend of skin/probe decoupling. The simulation results show reasonably consistent trends with the reported experimental data.
Keywords
Elastic-properties; Muscle-tissue; Musculoskeletal-system; Vibration; Vibration-effects; Hand-injuries; Skin-sensitivity; Peripheral-nervous-system; Sensory-motor-system; Sensory-thresholds; Biomechanics; Biomedical-engineering
Contact
National Institute for Occupational Safety and Health, 1095 Willowdale Road, Mail Stop- 2027, Morgantown, WV 26505
CODEN
ABMECF
Publication Date
20030701
Document Type
Journal Article
Email Address
jwu@cdc.gov
Fiscal Year
2003
NTIS Accession No.
NTIS Price
Issue of Publication
7
ISSN
0090-6964
NIOSH Division
HELD
Priority Area
Disease and Injury: Musculoskeletal Disorders of the Upper Extremities
Source Name
Annals of Biomedical Engineering
State
WV
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